If you go back to page 2 of this thread, it seems like there are several models that will meet your towing capacity requirements, but are not “Max Tow.”
Might make it easier to find a replacement.
Just a thought.
Here's one. I bought my Jeep here... but my Rubicon was $6000 less than this Max Tow:
New 2023 Jeep Gladiator For Sale Stock #DCJ230570 | Thornton CO | Call 3038354234 (lhmdenverjeep.com)
If your "Due Bill" says, "Install Max Tow Package," it seems like you have a valid reason to return the vehicle for a refund if that task is not performed. It doesn't say, "Install Receiver." That's very specific.